Shashawnee Hall (thanks to Mr M for stopping by and letting me know) plays the stadium worker. Apparently, he is in the new AT&T ad (new to me, I have never seen it) and I know him from his appearances on the show "Life".

I havent seen that AT&T that you speak; their ads are hit and miss, some run only in Chicago and L.A., while others are national. I will see if YouTube has the ad ... sometimes people respond their actors' names. Thanks for stopping by with this info!